/*
 * The contents of this web application are subject to the Mozilla Public License Version 
 * 1.1 (the "License"); you may not use this web application except in compliance with 
 * the License. You may obtain a copy of the License at http://www.mozilla.org/MPL/.
 * 
 * Software distributed under the License is distributed on an "AS IS" basis, 
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License 
 * for the specific language governing rights and limitations under the License.
 * 
 * The Original Code is owned by and the Initial Developer of the Original Code is 
 * Composite A/S (Danish business reg.no. 21744409). All Rights Reserved
 * 
 * Section 11 of the License is EXPRESSLY amended to include a provision stating 
 * that any dispute, including but not limited to disputes related to the enforcement 
 * of the License, to which Composite A/S as owner of the Original Code, as Initial 
 * Developer or in any other role, becomes a part to shall be governed by Danish law 
 * and be initiated before the Copenhagen City Court ("K�benhavns Byret")            
 */

using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Threading.Tasks;
using System.Web.Mvc;
using Composite.AspNet.MvcFunctions;
using Composite.Core.Routing.Pages;
using Composite.Functions;

namespace Composite.Plugins.Functions.FunctionProviders.MvcFunctions
{
    internal class MvcControllerFunction: MvcFunctionBase
    {
        private readonly ReflectedControllerDescriptor _controllerDescriptor;

        public MvcControllerFunction(ReflectedControllerDescriptor controllerDescriptor,
            string @namespace, string name, string description, FunctionCollection functionCollection)
            : base(@namespace, name, description, functionCollection)
        {
            Verify.ArgumentNotNull(controllerDescriptor, "controllerDescriptor");

            _controllerDescriptor = controllerDescriptor;

            RequireAsyncHandler = _controllerDescriptor.ControllerType
                            .GetMethods(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic)
                            .Any(method => method.ReturnType == typeof(Task)
                                           || (method.ReturnType.IsGenericType
                                               && method.ReturnType.GetGenericTypeDefinition() == typeof(Task<>)));
        }

        override internal IEnumerable<ParameterInfo> GetParameterInformation()
        {
            return _controllerDescriptor
                .GetCanonicalActions()
                .SelectMany(action => action.GetParameters()
                .Select(p => ((ReflectedParameterDescriptor)p).ParameterInfo));
        }

        private string GetParametersUrlString(ParameterList parameterList)
        {
            var result = "";
            foreach (var parameter in ParameterProfiles)
            {
                string value = parameterList.GetParameter(parameter.Name).ToString();

                result += "/" + value;
            }
            return result;
        }

        protected override string GetMvcRoute(ParameterList parameterList)
        {
            string pathInfo = C1PageRoute.GetPathInfo();

            return GetBaseMvcRoute(parameterList) + pathInfo;
        }

        protected override string GetBaseMvcRoute(ParameterList parameterList)
        {
            return "~/" + _controllerDescriptor.ControllerName + GetParametersUrlString(parameterList);
        }

        protected override bool HandlesPathInfo { get { return true; } }
    }
}
